Basically it's on the route to Seputeh, if you're going around the megamall loop, and is on the ground floor, where the large open courtyard is, and as you enter, its in the building on the left, ie, block B I think.

ISTHMUS, and is affiliated to that chain of restaurants in Melbourne, Isthmus of Kra, Monsoon and Madam Fang. (ie, one of the owners owns or used to own those restaurants). I hear their trademark baked oysters in terra cotta plates will be featured here as well.